In response to the ever-demanding performance requirements of modern machinery, Pioneer Machinery developed the Pioneer Machinery Explorer performance class of rolling bearings. Pioneer Machinery Cylindrical Roller Bearing realized this substantial improvement in performance by optimizing the internal geometry and surface finish of all contact surfaces, combining the extremely clean and homogenous steel with a unique heat treatment, optimizing the roller end / flange contact area and applying an advanced logarithmic contact profile to the rollers and raceways.